题目

(12分)已知的周长为,且.(I)求边的长;(II)若的面积为,求角的度数. 答案:解析:(I)由题意及正弦定理,得,,两式相减,得.(5分)(II)由的面积,得,(8分)由余弦定理,得                     ,所以.(12分) The new comers found it impossible to _______ themselves to the climate sufficiently to make permanent homes in the new country. A.adapt               B.suit                C.regulate       D.relate
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